Maxillary Sinus Vascular Malformation or Metastatic Renal Cell Carcinoma: The Importance of Differential Diagnosis

Epistaxis is a common presenting complain with varied differentials. Our case is of epistaxis due to maxillary sinus vascular malformation which could be managed with embolization and endoscopic excision. Histopathologically, the lesion had features of metastatic renal cell carcinoma (RCC). A RCC metastatic lesion masquerading as a maxillary sinus vascular malformation (VM) has been extremely rare in published literature. We present this interesting case of maxillary sinus VM and also briefly review the relevant literature.